3D Printed Gun Fails after Six Shots
December 4, 2012 9:27 AM
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3D printed AR lower receiver doesn't meet expectations
One of the more interesting technologies for creating rapid prototypes and other items is 3D printing. 3D printing is capable of producing just about anything you can imagine from
for medical uses, to prototype parts and even weapons.
A project called Defense Distributed has been working on 3D printer files that allow users to create components to build their own guns using a 3D printer. A group of testers used a 3D printed gun part design from creator HaveBlue to produce an AR lower receiver (the lower receiver is a key component of the weapon that receives the rifle cartridge from the magazine) and headed to the gun range.
Unfortunately, it appears that recoil pressure in the completed weapon was too much for the buffer section of the 3D printed lower. The buffer is a section that separates the stock from the upper receiver reports
. The part failed after firing only six shots. To make the failure even more embarrassing, the testers were using ammunition specifically designed for lower recoil.
The creator of the part claims to have printed his own and used it to fire hundreds of rounds.
While the firearm breaking in half while in operation seems to offer the potential for harm to the shooter and those nearby, the testers say that the only damage the operator faces is that of ego. When the weapon failed, the spring and buffer popped out of the tube and fell to the ground according to the testers.
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RE: They haven't taken the extra step.
12/5/2012 10:53:58 PM
These objects are basically just pure epoxy resin, or something fairly similar. Epoxy on its own is not very strong (especially in tension), and quite brittle - as evidenced here. You simply drop that plastic gun on a hard floor and it's very likely to crack. Doesn't seem very viable - or safe.
Maybe if glass fiber reinforcement could be added automatically during the printing process these items would stand up to some more abusive treatments. Still wouldn't be as tough as glass fiber reinforced thermoplastic of course, but better than now anyway...
"I'd be pissed too, but you didn't have to go all Minority Report on his ass!" -- Jon Stewart on police raiding Gizmodo editor Jason Chen's home
New 3D Printer Makes Implantable Cartilage
November 25, 2012, 7:28 PM
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